A cyclist travels at a us*ln 8s (merff28e 6vconstant speed of $22.0 \mathrm{~km} / \mathrm{hr}$ except for a 20 minute stop. The cyclists average speed was $17.5 \mathrm{~km} / \mathrm{hr}$. How far did the cyclist travel?

  Rank the magnitudes of the average acceleration during the te inq3n(.0 tsfjn second interval.

  Rank the magnitudes of the maximum velocity achieved during the ten second y: r1 yqk7uw.ointervw yu7kry: 1.qoal.

  Rank the magnitudes of the distance traveled during th37.f/g .:, fg zwq 5)eyguvpwgnk3/w) vrqfnce ten second interval.

  A crude approximation is that the Earth travels in a circular orbit ab,tb-kds( *ib(ht dw0mout the Sun at constant speed, at a distancki( t*dbmb-swhd 0t( ,e of $150,000,000 \mathrm{~km}$ from the Sun. Which of the following is the closest for the acceleration of the Earth in this orbit?

  A child is sliding out of g sf)(p hf9doktzs8. )control with velocity $v_{\mathrm{c}}$ across a frozen lake. He runs head-on into another child, initially at rest, with 3 times the mass of the first child, who holds on so that the two now slide together. What is the velocity of the couple after the collision?

  An ice skater can roqj8c.*zx d576wru lc(k bo-yuo.+ pq htate about a vertical axis with an angular velocity $\omega_{0}$ by holding her arms straight out. She can then pull in her arms close to her body so that her angular velocity changes to $2 \omega_{0}$, without the application of any external torque. What is the ratio of her final rotational kinetic energy to her initial rotational kinetic energy?

  When a block of wood with a weight of-)ljw:z dcq d/ $30 \mathrm{~N}$ is completely submerged under water the buoyant force on the block of wood from the water is $50 \mathrm{~N}$. When the block is released it floats at the
surface. What fraction of the block will then be visible above the surface of the water when the block is floating?

  A spring has an equilibri 8o nkz9 bdp)1mko .4kl1/pndfum length of 2.0 meters and a spring constant of 10 newtons/meter. Alice is pulling on one end of the spring with a force of 3.0 newtons. Bob is pulling on the opposite end of the spring with a force of 3.0 newtons, in o p9 4kp/)81k zdln.1 knbomfdthe opposite direction. What is the resulting length of the spring?

  Which of the following changes will t 1y;jb)pzb;w result in an increase in the period of a simple pentj p); zwybb1;dulum?

  A large metal cylindrical cup floats in ay 4d2t 1rmayv4gm ,;db rectangular tub half-filled with water. The tap is placedy4tv4mm; ,bdgyd1a2 r over the cup and turned on, releasing water at a constant rate. Eventually the cup sinks to the bottom and is completely submerged. Which of the following five graphs could represent the water level in the sink as a function of time?

  You are given a large collection of identical heavy balls and lightweiomgcz 7.ig1yc og7q+1 ght rods. When two balls are placed at the ends of one rod and icg7. q og7zmg1oyic+1nteract through their mutual gravitational attraction (as is shown on the left), the compressive force in the rod is $F$. Next, three balls and three rods are placed at the vertexes and edges of an equilateral triangle (as is shown on the right). What is the compressive force in each rod in the latter case?

  The apparatus in the diagram consists of a solid cylinder of radiw7hqvc 9 kj)9eus $1 \mathrm{~cm}$ attached at the center to two disks of radius $2 \mathrm{~cm}$. It is placed on a surface where it can roll, but will not slip. A thread is wound around the central cylinder. When the thread is pulled at the angle $\theta=90^{\circ}$ to the horizontal (directly up), the apparatus rolls to the right. Which below is the largest value of $\theta$ for which it will not roll to the right when pulling on the thread?

  You have 5 different strings with weights tied at various point, all h( qxzqmz5s 1z4z;ghc-.2w9 xsnwcigu/ ytm( 1 anging from the ceiling, and reaching down to the floor. The string is released at the top, allowing the weights to fall. Which one will create a regular, uniform beating sozu5x c21 tzmhw1/(sg9q q.x(w;m-gisyzc4znund as the weights hit the floor?

  A vertical mass-spring oscillator is displacq us0k8myb.+g)csv, w ed $2.0 \mathrm{~cm}$ from equilibrium. The $100 \mathrm{~g}$ mass passes through the equilibrium point with a speed of $0.75 \mathrm{~m} / \mathrm{s}$. What is the spring constant of the spring?

  What magnitude force does Jonathan need to exert on the 9r q:)od gk8xpphysics book to keep thek)x9pg r:q d8o rope from slipping?

  Jonathan applies a normosp w2.9 mnzj)z yi3+tal force that is just enough to keep the rope from slipping. Becky makes a small jump, barely leaving contact with the floorwnyi3 zj9m+ po2t s)z. of the box. Upon landing on the box, the force of the impact causes the rope to start slipping from Jonathans hand. At what speed does the box smash into the ground? Assume Jonathans normal force does not change.

  A block of mass $m=3.0 \mathrm{~kg}$ slides down one ramp, and then up a second ramp. The coefficient of kinetic friction between the block and each ramp is $\mu_{\mathrm{k}}=0.40$. The block begins at a height $\mathrm{h}_{1}=1.0 \mathrm{~m}$ above the horizontal. Both ramps are at a $30^{\circ}$ incline above the horizontal. To what height above the horizontal does the block rise on the second ramp?

  After how much time will the particle first retur s.fu .lk) 7xpwg6f2ccn to the origin?

  What is the maximum dunlm.ftks o* 3-sa0 hwr*lj0 6istance between the particle and the origin?

  An engineer is given a fixed v-)7wtfb y 9mv/elsy,volume $V_{m}$ of metal with which to construct a spherical pressure vessel. Interestingly, assuming the vessel has thin walls and is always pressurized to near its bursting point, the amount of gas the vessel can contain, $n$ (measured in moles), does not depend on the radius $r$ of the vessel; instead it depends only on $V_{m}$ (measured in $\mathrm{m}^{3}$ ), the temperature $T$ (measured in $\mathrm{K}$ ), the ideal gas constant $R$ (measured in $\mathrm{J} /(\mathrm{K} \cdot \mathrm{mol})$ ), and the
tensile strength of the metal $\sigma$ (measured in $\mathrm{N} / \mathrm{m}^{2}$ ). Which of the following gives $n$ in terms of these parameters?

  This graph depicts the torque outsx v1ye/j)-th put of a hypothetical gasoline engine as a function of rotatt/1 -xh) esyjvion frequency. The engine is incapable of running outside of the graphed range.


At what engine RPM (revolutions per minute) does the engine produce maximum power?

  A particle is launched from the surface of ;q m4i owzafcs 5df(69a uniform, stationary spherical planet at an angle to the vertical. The 6f4osi(d qfwzm;5a c9particle travels in the absence of air resistance and eventually falls back onto the planet. Spaceman Fred describes the path of the particle as a parabola using the laws of projectile motion. Spacewoman Kate recalls from Keplers laws that every bound orbit
around a point mass is an ellipse (or circle), and that the gravitation due to a uniform sphere is identical to that of a point mass. Which of the following best explains the discrepancy?

  A turntable is supported on a Teflon ring )+fx+)0/ e1 jywz4lp g5nu(zlnufjsq of inner radius $R$ and outer radius $R+\sigma(\sigma << R)$, as shown in the diagram. To rotate the turntable at a constant rate, power must be supplied to overcome friction. The manufacturer of the turntable wishes to reduce the power required without changing the rotation rate, the weight of the turntable, or the coefficient of friction of the Teflon surface. Engineers propose two solutions: increasing the width of the bearing (increasing $\sigma$ ), or increasing the radius (increasing $R$ ). What are the effects of these proposed changes?

  A hollow cylinder with a very thin wall (like a toilet paj w 4*x/h-p dphsfb;c5per tube) and a block are placed at rest at the top of a plane shpxdbjcfh;*45-p /w with inclination $\theta$ above the horizontal. The cylinder rolls down the plane without slipping and the block slides down the plane; it is found that both objects reach the bottom of the plane simultaneously. What is the coefficient of kinetic friction between the block and the plane?